8.5E - Law of Conservation of Mass

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that matter cannot be created or destroyed in a chemical reaction; it can only be transformed or changed from one form to another.

Front

What happens to the total mass of reactants in a chemical reaction?

Back

The total mass of reactants before a chemical reaction is equal to the total mass of products after the reaction.

Front

If 125 grams of sugar, 250 grams of water, and 5 grams of flavoring are mixed, what is the total weight of the solution?

Back

The total weight of the solution is 380 grams.

Front

In a chemical reaction, if 2g of Hydrogen and 4g of Oxygen react, how much water is produced?

Back

6g of water is produced.

Front

If a reaction starts with 20g of reactants, what should be the total mass of the products?

Back

The total mass of the products should be 20g.

Front

What is meant by 'transformation' in the context of the Law of Conservation of Mass?

Back

Transformation refers to the process of changing the form of matter during a chemical reaction, while the total mass remains constant.

Front

Do the products of a chemical reaction weigh more, less, or the same as the reactants?

Back

The products weigh the same as the reactants.

Front

What is an example of a chemical reaction that demonstrates the Law of Conservation of Mass?

Back

The reaction of hydrogen and oxygen to form water, where the total mass of hydrogen and oxygen equals the mass of the water produced.

Front

What is a common misconception about the Law of Conservation of Mass?

Back

A common misconception is that mass can be lost during a chemical reaction; however, mass is always conserved.

Front

How can we measure the mass of reactants and products in a chemical reaction?

Back

We can use a balance to measure the mass of reactants before the reaction and the mass of products after the reaction.